Tuesday, May 16, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, MAY 16, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
HIGH PRESSURE LEADS TO ABUNDANT SUNSHINE AND WARM TEMPS
Temperatures reached 77F by 1:00PM EST today, making
today the warmest day since the month started and the
first day to rise above 60F since May 7. The below
normal temperatures from the first half the month have
dropped the cumulative temperature departure for May
to 68 deg F, or 4.7 deg F per day, below normal.
Atmospheric pressured continued to rise through the early
afternoon. Mostly sunny skies and 70-mile visibility
accompanied the warm temperatures. Winds were slightly
gusty and out of the northwest and west.
Today’s Observations:
7 A.M.
Weather: Scattered cirrus
Temperature: 57F; Dew Point: 45F; Wind: NW at 12G18 kts
Sea-level pressure: 29.90 ins. Hg, rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 57F
6-hr Min temp: 51F
24-hr precip: 0.07 in.
BHO SA 1155 250 SCT 70 124/57/45/3112G18/990/
8/002 51023 MANUAL 70007 ASOS 70007 10057 20051
10 A.M.
Weather: Scattered cirrus
Temperature: 70F; Dew Point: 46F; Wind: NW at 10G16 kts
Sea-level pressure: 29.91 ins. Hg, rising then steady
Visibility: 70 miles
BHO SA 1455 250 SCT 70 128/70/46/3110G16/991/ 8/001 50004
1 P.M.
Weather: Few cumulus SE-S, scattered cirrus
Temperature: 77F; Dew Point: 42F; Wind: W at 9G18 kts
Sea-level pressure: 29.91 ins. Hg, rising then falling
Visibility: 70 miles
6-hr Max temp: 77F
6-hr Min temp: 57F
BHO SA 1755 250 SCT 70 128/77/42/2809G18/991/
FEW CU SE-S/ 8/101 50000 10077 20057
SUMMARY FOR MONDAY, MAY 15, 2017
TEMPERATURE (DEGREES F)
MAX…..58 NORMAL…..66
MIN…..43 NORMAL…..48
MEAN….51 NORMAL…..57
DEPARTURE FROM 30-YEAR NORMAL…………………….-6
TOTAL DEPARTURE FOR THE MONTH……………………-68 [-4.7 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..14 DEPARTURE……….+5
TOTAL HEATING UNITS FOR THE MONTH………….220 DEPARTURE………+60
TOTAL HEATING UNITS FOR THE SEASON………..5553 DEPARTURE……..-642
TOTAL HEATING UNITS LAST SEASON TO DATE……5176 DIFFERENCE…….+377
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….36 NNW AT 6:02 P.M.
AERO……………………40 NNW AT 6:00 P.M.
ASOS……………………40 NNW AT 5:56 P.M.
DAVIS…………………..36 NW AT 6:06 P.M. RMY 41
FASTEST MILE FOR YESTERDAY…………………29 NNW AT 5:58 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………26 NNW AT 6:00 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..26 NW AT 5:56 P.M.
AVERAGE WIND SPEED AND DIRECTION………….15.8 NW
ASOS………………….15.7
DAVIS…………………14.1 NW [315 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.07 DEPARTURE……-0.05
ASOS…………..0.07
TOTAL PRECIPITATION FOR THE MONTH……….3.15 DEPARTURE……+1.32
ASOS…………..3.22
TOTAL PRECIPITATION FOR THE YEAR……….23.96 DEPARTURE……+3.58
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
5/1 50/43/47/-6/T/…/.. 21 N AERO 18 N RMY 22
5/2 65/42/54/+1/0.26/…/.. 41 W AERO 44 W RMY 43
5/3 52/42/53/0/0.00/…/.. 37 WNW*AERO 39 WNW RMY 40
5/4 65/40/53/-1/0.00/…/.. 23 S AERO 23 S RMY 24
5/5 51/44/48/-6/0.73/…/.. 28 E AERO 28 E RMY N/A
5/6 65/50/58/+4/0.23/…/.. 46 SSE AERO 48 SSE RMY 49
5/7 63/47/55/0/T/…/.. 35 S AERO 38 S RMY 39
5/8 54/38/46/-9/T/…/.. 29 WSW AERO 29 WSW RMY 32
5/9 53/36/45/-10/T/…/.. 20 ESE AERO 17 ESE RMY 19
5/10 57/42/50/-5/0.00/…/.. 17 NNE AERO 16 NW RMY N/A
5/11 58/45/52/-4/0.00/…/.. 23 NE* AERO 23 NE RMY 23
5/12 57/41/49/-7/0.01/…/.. 21 NE AERO 20 NE RMY 19
5/13 57/41/49/-7/0.19/…/.. 24 ENE AERO 24 E RMY N/A
5/14 47/43/45/-12/1.49/…/.. 33 NNE AERO 36 N RMY 36
5/15 58/43/51/-6/0.24/…/.. 36 NNW AERO 40 NNW RMY 41
5/16 Low temp since midnight is 51F; normal low is now 48F
DAILY RECORDS FOR MAY
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR MAY 16
HIGH 90F IN 1951
LOW 30F IN 1936
PRECIP 2.63 INCHES IN 1954
PEAK GUST 56e MPH NW IN 1952
RECORDS FOR MAY 17
HIGH 88F IN 1974, 1977
LOW 34F IN 1956, 1957
PRECIP 2.07 INS IN 1916
PEAK GUST 52 MPH SW IN 1967, W IN 1974
TODAY’S REPORT PREPARED BY: Nick Rousseau and Cecilia Borries-Strigle
